package com.tanhua.common.service;

import com.aliyun.oss.OSSClient;
import com.tanhua.common.config.AliyunConfig;
import com.tanhua.common.vo.PicUploadResult;
import org.apache.commons.lang3.RandomUtils;
import org.apache.commons.lang3.StringUtils;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayInputStream;

@Service
public class PicUploadService {
    // 允许上传的格式
    private static final String[] IMAGE_TYPE = new String[]{".bmp", ".jpg", ".jpeg", ".gif", ".png"};

    @Autowired
    private OSSClient ossClient;

    @Autowired
    private AliyunConfig aliyunConfig;

    public PicUploadResult upload(MultipartFile uploadFile) {
        PicUploadResult fileUploadResult = new PicUploadResult();

        // 校验图片后缀名
        // 默认不合法
        boolean isLegal = false;

        for (String type : IMAGE_TYPE) {
            if (StringUtils.endsWithIgnoreCase(uploadFile.getOriginalFilename(), type)) {
                isLegal = true;
                break;
            }
        }

        // 如果不合法,直接return
        if (!isLegal) {
            fileUploadResult.setStatus("error");
            return fileUploadResult;
        }

        // 走到这里,说明文件合法,准备文件新路径
        String fileName = uploadFile.getOriginalFilename();
        String filePath = getFilePath(fileName);

        // 上传到阿里云
        try {
            // 目录结构：images/2018/12/29/xxxx.jpg
            ossClient.putObject(aliyunConfig.getBucketName(), filePath,
                    new ByteArrayInputStream(uploadFile.getBytes()));
        } catch (Exception e) {
            e.printStackTrace();
            // 上传失败
            fileUploadResult.setStatus("error");
            return fileUploadResult;
        }

        // 走到这里,即上传成功
        fileUploadResult.setStatus("done");
        fileUploadResult.setName(this.aliyunConfig.getUrlPrefix() + filePath);
        fileUploadResult.setUid(String.valueOf(System.currentTimeMillis()));

        return fileUploadResult;
    }

    private String getFilePath(String sourceFileName) {
        DateTime dateTime = new DateTime();
        return "images/"
                + dateTime.toString("yyyy")
                + "/"
                + dateTime.toString("MM")
                + "/"
                + dateTime.toString("dd")
                + "/"
                + System.currentTimeMillis()
                + RandomUtils.nextInt(100, 9999) + "."
                + StringUtils.substringAfterLast(sourceFileName, ".");
    }
}
